<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
  <style>
    #d1{
      width: 100px;height: 100px;border: 1px solid red;
        margin-right:100px ;
    }
    #d2{
      width: 100px;height: 100px;border: 1px solid red;
        margin-top: 100px;
    }
    #big{
        width: 200px;
        height: 200px;
        background-color: red;
        overflow: hidden;/*解决粘连问题*/
    }
    #big>div{
        width: 50px;
        height: 50px;
        background-color: green;
        margin-left: 50px;
        margin-top: 50px;
    }
  </style>
</head>
<body>
<div id="big">
    <div></div>
</div>
<span id="s1">span1</span><span id="s2">span2</span>
<div id="d1"></div>
<div id="d2"></div>
</body>
</html>